* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #a164df;
    font-family: sans-serif;
    text-align: center;
}
.btn {
    background-color: #639;
    border: 0;
    border-radius: 5px;
    padding: 1.5rem  3rem;
    margin: 1rem;
    color: white;
    font-size: 1.2rem;
    font-family: inherit;
    outline: none;
    cursor: pointer;
}
.btn:hover {
    opacity: 0.8;
}
.btn:active {
    transform: scale(0.98);
}